Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plane view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 8 is an end view taken along line 8-8 in FIG. 7; and,

FIG. 9 is an end view taken along line 9-9 in FIG. 7 thereof.

In the drawings, the broken lines defining the sidewall, inner bead and the peripheral boundary between the claimed tire tread and the unclaimed sidewall depict environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a tread portion of an automobile tire, as shown and described. 